There's another new jig, search for Dead Edge Honing Guide, works like a shooting board. This one is much more affordable though and looks quite good.
I guess it could be useful for some, not everyone wants to learn to sharpen freehand, or know freehand sharpening but prefer consistent angles with each sharpen.
Perhaps people just enjoy doing things differently.
Edit: Am I the only one who thinks it's insane how off the rail sharpening threads go on this forum?